Year	Percent change
1980	25.156
1981	69.6
1982	95.401
1983	49.487
1984	64.897
1985	91.602
1986	453.538
1987	360.357
1988	374.354
1989	95.77
1990	36.031
1991	81.817
1992	37.705
1993	8.379
1994	9.488
1995	16.93
1996	5.59
1997	3.1
1998	8.11
1999	4.11
2000	-1.77
2001	-0.31
2002	4.08
2003	3.3
2004	7.89
2005	8.39
2006	7.5
2007	8.35
2008	23.12
2009	6.72
2010	9.21
2011	18.669
2012	9.103
2013	6.595
2014	4.085
2015	0.631
2016	2.668
2017	3.521
2018	3.54
2019	3.091
2020	3.3
2021	3.45
2022	3.55
2023	3.7
2024	3.9